How we rate
“Strong” = several concordant meta-analyses or systematic reviews. “Moderate” = one synthesis, or several controlled trials. “Limited” = early trials only. The rating is about the quality of the studies, not about how useful the supplement is.
Pea protein
Plant-based protein extracted from the pea. With weight training, it promoted strength and muscle gains just as much as whey in an 84-day trial; taken with carbohydrates, it slows down the rise in blood sugar. Less effective than whey against muscle damage.
Benefits
- Strength and muscle: in sedentary adults starting weight training, 84 days of pea protein led to a 16.1 % overall strength gain, and just as much strength and muscle as whey.
- Post-workout: in 33 trained practitioners, 25 g of pea protein stimulated muscle protein synthesis just as much as 25 g of mycoprotein, a complete protein.
- Functional training: over 8 weeks, 24 g of pea or whey before and after each training session yielded the same strength gains on the squat and deadlift.
- Digestibility: in healthy adults, 93.6 % of pea amino acids are absorbed, compared to 96.8 % for milk casein, a non-significant difference; its quality score (DIAAS) reaches 1.00, enough to cover all amino acid requirements.
- Blood sugar: with a glucose drink, 20 g of pea reduced the blood glucose spike over 3 hours (89.8 against 143.2 for glucose alone), as much as 20 g of whey and with less insulin.
- Before the meal: taken before carbohydrates rather than with them, pea flattened the blood glucose curve more (0.46 against 1.125 mmol/L, compared to 1.89 without protein).
- Appetite: in a high-protein breakfast, pea protein had the same effects as whey on appetite, energy expenditure and 24-hour intake, in both young and older men.
Precautions
Tolerance: in the 84-day trial, pea protein was safe and well tolerated, like whey (adverse effects, vital signs, and blood tests monitored). Limitations: muscle damage: in 92 men after eccentric exertion, pea had only an intermediate, non-significant effect on muscle damage markers; in 47 walkers over 60 years old, 25 g per day changed nothing, unlike whey. Small trials: the 8-week trial only involved 15 people, and no group gained muscle in it; the trial in 12 young soccer players found a slight advantage for pea on a few blood markers, which the authors deem insufficient to choose a protein. Amino acids: leucine, valine, lysine, and phenylalanine from pea are less well digested than those from casein. Cholesterol: in bars, pea protein alone did not lower cholesterol; only its combinations with a soluble fiber (oat fiber, apple pectin) did, by 4.7 to 6.4 %. Satiety: in a mixed meal, replacing other proteins with pea changed neither satiety nor what was eaten afterwards.
Recommended dosage
20 to 25 g per serving in the trials (24 g before and after the training session), or 0.9 g per kg per day in three servings over 5 days after intense exertion.
How to take it
- Who it is for: for anyone wanting a dairy-free protein; trials have compared it mainly to whey, in sedentary individuals, athletes, and the elderly.
- Dose: 20 to 25 g per serving in most trials; 24 g before and after the training session on training days, between meals on other days, in the 8-week trial.
- Duration: from 8 weeks to 84 days in strength and muscle trials, combined with weight training.
- With carbohydrates: taken before a carbohydrate-rich meal, it limited the rise in blood sugar better than when taken at the same time.
- Leucine: with a low-protein breakfast, blood leucine rose less high with pea than with whey in middle-aged and older adults.
- Blend: in older individuals, blending casein and pea (60/40) increased essential amino acids, methionine, and leucine more than pea alone.
- What does not work: it did not reduce soreness or muscle damage after intense exertion, whereas whey did better.
Did you know?
Swallowed with a glucose drink, 20 g of pea protein curbed the blood sugar spike at least as much as 20 g of whey, while causing less insulin to be secreted.
What the studies say
This randomized crossover study compared the effect of ingesting 10 g or 20 g of pea or whey protein with glucose on glycemic and insulinemic responses in 30 healthy individuals. The study showed that 20 g of pea protein and 20 g of whey protein reduced the glycemic response. However, 20 g of pea protein resulted in a significantly lower insulinemic response than 20 g of whey protein, indicating a superior effect of pea protein on reducing blood glucose without excessive increases in insulin.
Thondre PS, Young E, Pledger S, Kefyalew S, Hatami I, Perreau C, Guérin Deremaux L, Lefranc-Millot C, Tammam J. — PloS one (2026) — View the source study
Pairs well with
For information only: not a substitute for medical advice. Dietary supplements are not a replacement for a varied, balanced diet. Learn more